After news broke Dec. 7 the Dexter stars were getting divorced, new details have surfaced and according to documents obtained by TMZ, they have been separated since Aug. 9!

Jennifer Carpenter and Michael C. Hall, who play a brother and sister on Showtime’s Dexter, have decided to end their marriage and the papers were filed Dec. 17.

According to the documentation obtained by TMZ, Jennifer is seeking the divorce through the L.A. County Superior Court and is citing “irreconcilable differences.” The couple, who married in 2008, has no children but Jennifer is still looking for spousal support and coverage of her attorney fees.

Even though they’ve made public appearances together since, the papers claim Michael and Jennifer have been separated since Aug. 9! What do YOU think Jennifer means by “irreconcilable differences?”